package com.store.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

/**
 * Jackson配置类
 * 解决Long类型精度丢失问题
 */
@Configuration
public class JacksonConfig {
    
    @Bean
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        
        // 全局配置序列化返回 JSON 处理
        SimpleModule simpleModule = new SimpleModule();
        // Long类型转String，避免前端精度丢失
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        
        objectMapper.registerModule(simpleModule);
        
        return objectMapper;
    }
}


